电梯块式制动器热-结构耦合仿真及其热疲劳寿命预测
Coupled Thermal-structure Simulation of Elevator Block Brake and its Thermal Fatigue Life Prediction
路明雪 1胡明 1林青云 2叶杰凯 2周奇彪2
作者信息
- 1. 浙江理工大学 机械工程学院 杭州 310018
- 2. 丽水市特种设备检测院 丽水 323000
- 折叠
摘要
电梯紧急制动工况下,块式制动器制动轮与闸瓦在摩擦生热作用下使制动器强度减弱,最终导致制动器热疲劳失效,因此制动器热疲劳寿命受热-结构耦合特性影响.通过对电梯块式制动器热-结构耦合仿真,得到制动器温度场和应力场相互耦合,且两者分布不均匀;同时考虑在紧急制动工况下制动轮与闸瓦接触表面轴向、径向以及周向三向对应力场的影响,并获取制动轮与闸瓦接触区域的三向应力分布,根据制动器热 结构耦合仿真结果分析确定紧急制动时制动器易发生热疲劳部位.在紧急制动工况下,基于制动轮材料的S-N曲线采用Manson-Coffin公式,完成紧急制动工况下制动轮的热疲劳寿命预测,为电梯制动器的优化设计和维护提供依据.
Abstract
Under the emergency braking condition of the elevator,the brake wheel and brake shoe of the block brake weaken the strength of the brake under the action of friction and heating,which eventually leads to the thermal fatigue failure of the brake,so the thermal fatigue life of the brake is affected by the thermal-structural coupling characteristics.Considering the influence of the axial,radial and circumferential three-way stress fields on the stress field of the contact surface between the brake wheel and the brake shoe under the emergency braking condition,and the three-way stress distribution of the contact area between the brake wheel and the brake shoe is obtained,the thermal fatigue part of the brake during emergency braking is determined according to the simulation results of the thermal-structural coupling simulation of the brake.In the case of emergency braking,the Manson-Coffin formula is used to predict the thermal fatigue life of the brake wheel based on the S-N curve based on the material of the brake wheel,which provides a basis for the optimal design and maintenance of the elevator brake.
关键词
电梯块式制动器/热-结构耦合/热疲劳寿命预测/紧急制动工况Key words
Elevator block brakes/Thermal-structural coupling/Thermal fatigue life prediction/Emergency braking condition引用本文复制引用
出版年
2024
NETL
NSTL
万方数据